Three layers provide pressure distribution and weight equalization to meet the unique demands of the bariatric patient:1. Medium density foam base2. Non-aqueous specialized visco-elastic gel core layer reduces tissue interface pressure at critical points    • Proprietary gel is a flexible solid that will not leak    • Gel is placed at three pressure zones3. Visco elastic memory foam topper for superior comfort and pressure relief. Positions the user with a moderate slope from front to back 4"; Cushion Strap to secure cushion firmly to the chair 650 lb maximum weight capacity 18-month limited warranty Cover features Fluid-proof stretch top cover, reduces shear/friction Antimicrobial Flame retardant Removable and washable Non-skid base